lim的安卓总结

公英制转换

JAVA文件

package com.example.inchmetricconverter;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity{

EditTextedit1;

EditTextedit2;

@Override

protectedvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

finalButton Trans1 = (Button) findViewById(R.id.button1);

finalButton Trans2 = (Button) findViewById(R.id.button2);

//final EditText final EditText

edit1= (EditText) findViewById(R.id.EditText1);

edit2= (EditText) findViewById(R.id.EditText2);

Trans1.setOnClickListener(newOnClickListener(){

@Override

publicvoid onClick(View view) {

//TODO Auto-generated method stub

doubleb = Integer.parseInt(edit1.getText().toString())*2.54;

edit2.setText(String.valueOf(b));

finish();

}

});

Trans2.setOnClickListener(newOnClickListener(){

@Override

publicvoid onClick(View view) {

//TODO Auto-generated method stub

doublea = Double.parseDouble(edit2.getText().toString())/2.54;

edit1.setText(String.valueOf(a));

finish();

}

});

}

Main.xml代码：

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="com.example._inch_metric_converter.MainActivity">

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_marginTop="52dp"

android:text="英制： " />

<TextView

android:id="@+id/textView2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignBaseline="@+id/EditText2"

android:layout_alignBottom="@+id/EditText2"

android:text="公制： " />

<EditText

android:id="@+id/EditText1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignBaseline="@+id/textView1"

android:layout_alignBottom="@+id/textView1"

android:layout_toRightOf="@+id/textView1"

android:ems="10"

android:text="" />

<EditText

android:id="@+id/EditText2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/EditText1"

android:layout_marginTop="19dp"

android:layout_toRightOf="@+id/textView2"

android:ems="10"

android:text="" />

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/EditText2"

android:text="英转公" />

<Button

android:id="@+id/button2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/EditText2"

android:layout_centerHorizontal="true"

android:text="公转英" />

<TextView

android:id="@+id/textView3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/EditText1"

android:layout_alignParentTop="true"

android:text="英制公制转换器" />

</RelativeLayout>

Mune代码：

<menu xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

tools:context="com.example.inchmetricconverter.MainActivity">

<item

android:id="@+id/action_settings"

android:orderInCategory="100"

android:showAsAction="never"

android:title="@string/action_settings"/>

</menu>

Dimens代码：

<dimenname="activity_horizontal_margin">16dp</dimen>

<dimenname="activity_vertical_margin">16dp</dimen>

</resources>

String代码：

<?xml version="1.0"encoding="utf-8"?>

<stringname="app_name">InchMetricConverter</string>

<string name="hello_world">Hello world!</string>

<string name="action_settings">Settings</string>

</resources>

计算器mainacitviity.java

packagecom.example.administrator.mycalculation;

importandroid.support.v7.app.AppCompatActivity;

importandroid.os.Bundle;

importandroid.view.View;

importandroid.widget.Button;

importandroid.widget.TextView;

publicclass MainActivity extends AppCompatActivity {

TextView rv;

Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0;

Buttonbad,bsu,bmu,bdi,bpo,bsq,bc,bce,bas,beq;

@Override

protected void onCreate(BundlesavedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

rv=(TextView)findViewById(R.id.result);

b0=(Button)findViewById(R.id.b0);

b1=(Button)findViewById(R.id.b1);

b2=(Button)findViewById(R.id.b2);

b3=(Button)findViewById(R.id.b3);

b4=(Button)findViewById(R.id.b4);

b5=(Button)findViewById(R.id.b5);

b6=(Button)findViewById(R.id.b6);

b7=(Button)findViewById(R.id.b7);

b8=(Button)findViewById(R.id.b8);

b9=(Button)findViewById(R.id.b9);

beq=(Button)findViewById(R.id.beq);

bad=(Button)findViewById(R.id.bad);

bsu=(Button)findViewById(R.id.bsu);

bdi=(Button)findViewById(R.id.bdi);

bmu=(Button)findViewById(R.id.bmu);

bas=(Button)findViewById(R.id.bas);

bsq=(Button)findViewById(R.id.bsq);

bpo=(Button)findViewById(R.id.bpo);

bce=(Button)findViewById(R.id.bce);

bc=(Button)findViewById(R.id.bc);

Button.OnClickListenerbuttonListener=new Button.OnClickListener(){

@Override

public void onClick(View view) {

switch (view.getId()) {

case R.id.b0:

if (rv.getText().toString().equals("0")){

rv.setText(b0.getText());

} else {

rv.append(b0.getText());

}

break;

case R.id.b1:

if(rv.getText().toString().equals("0")) {

rv.setText(b1.getText());

} else {

rv.append(b1.getText());

}

break;

case R.id.b2:

if(rv.getText().toString().equals("0")) {

rv.setText(b2.getText());

} else {

rv.append(b2.getText());

}

break;

case R.id.b3:

if(rv.getText().toString().equals("0")) {

rv.setText(b3.getText());

} else {

rv.append(b3.getText());

}

break;

case R.id.b4:

if(rv.getText().toString().equals("0")) {

rv.setText(b4.getText());

} else {

rv.append(b4.getText());

}

break;

case R.id.b5:

if(rv.getText().toString().equals("0")) {

rv.setText(b5.getText());

} else {

rv.append(b5.getText());

}

break;

case R.id.b6:

if (rv.getText().toString().equals("0")){

rv.setText(b6.getText());

} else {

rv.append(b6.getText());

}

break;

case R.id.b7:

if(rv.getText().toString().equals("0")) {

rv.setText(b7.getText());

} else {

rv.append(b7.getText());

}

break;

case R.id.b8:

if(rv.getText().toString().equals("0")) {

rv.setText(b8.getText());

} else {

rv.append(b8.getText());

}

break;

case R.id.b9:

if(rv.getText().toString().equals("0")) {

rv.setText(b9.getText());

} else {

rv.append(b9.getText());

}

break;

case R.id.bc:

rv.setText("0");

break;

case R.id.bad:

rv.append("+");

break;

case R.id.bsu:

rv.append(bsu.getText());

break;

case R.id.bmu:

rv.append(bmu.getText());

break;

case R.id.bdi:

rv.append(bdi.getText());

break;

case R.id.bpo:

rv.append(bpo.getText());

break;

case R.id.bsq:

rv.setText(bsq.getText());

break;

case R.id.bce:

rv.setText(rv.getText().toString().substring(0,rv.getText().toString().length()-1));

break;

case R.id.beq:

Strings=rv.getText().toString();

if(s.equals("0")){

rv.setText("0");

}

if(s.contains("+")){

Stringczs[]=s.split("\\+");

double res=0.0;

int i=0;

for(i=0;i<czs.length;i++){

res=res+Double.parseDouble(czs[i]);

}

rv.setText(Double.toString(res));

}

if(s.contains("-")){

Stringczs[]=s.split("-");

double res=0.0;

int i=0;

for(i=0;i<czs.length;i++){

if(i==0){

res=Double.parseDouble(czs[i]);

}else{

res=res-Double.parseDouble(czs[i]);

}

rv.setText(Double.toString(res));

}

if(s.contains("/")){

Stringczs[]=s.split("/");

doubleres=Double.parseDouble(czs[0]);

int i=0;

for(i=0;i<czs.length;i++){

if(Double.parseDouble(czs[i])==0){

rv.setText("鏃犳硶璁＄畻");

break;

}else{

if(i!=0){

res=res/Double.parseDouble(czs[i]);

}

rv.setText(Double.toString(res));

}

if(s.contains("*")) {

Stringczs[] = s.split("\\*");

doubleres = 1.0;

int i = 0;

for (i =0; i < czs.length; i++) {

res= res * Double.parseDouble(czs[i]);

}

rv.setText(Double.toString(res));

}

if(s.contains("鈭?)){

Stringczs=s.substring(1,s.length());

doubleres=Double.parseDouble(czs);

res=Math.sqrt(res);

rv.setText(Double.toString(res));

}

break;

default:break;

}

};

b0.setOnClickListener(buttonListener);

b1.setOnClickListener(buttonListener);

b2.setOnClickListener(buttonListener);

b3.setOnClickListener(buttonListener);

b4.setOnClickListener(buttonListener);

b5.setOnClickListener(buttonListener);

b6.setOnClickListener(buttonListener);

b7.setOnClickListener(buttonListener);

b8.setOnClickListener(buttonListener);

b9.setOnClickListener(buttonListener);

beq.setOnClickListener(buttonListener);

bad.setOnClickListener(buttonListener);

bsu.setOnClickListener(buttonListener);

bdi.setOnClickListener(buttonListener);

bmu.setOnClickListener(buttonListener);

bas.setOnClickListener(buttonListener);

bpo.setOnClickListener(buttonListener);

bsq.setOnClickListener(buttonListener);

bce.setOnClickListener(buttonListener);

bc.setOnClickListener(buttonListener);

}

Main_actiity.xml

<?xmlversion="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayoutxmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.example.administrator.mycalculation.MainActivity">

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="vertical">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/title"

android:layout_gravity="center"

android:gravity="center"

android:textSize="40sp"/>

<TextViewandroid:id="@+id/result"

android:layout_width="match_parent"

android:layout_height="100dp"

android:layout_gravity="center"

android:gravity="bottom"

android:text="@string/bcl"

android:textSize="40sp"

android:textAlignment="viewEnd"/>

<TableLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:stretchColumns="0">

<TableRow

android:layout_height="wrap_content"

android:layout_width="fill_parent">

<Buttonandroid:id="@+id/bc"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bc"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bce"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bce"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bas"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bas"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bsq"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bsq"

android:textSize="25sp"/>

</TableRow>

<TableRow

android:layout_height="wrap_content"

android:layout_width="fill_parent">

<Buttonandroid:id="@+id/b1"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b1"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b2"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b2"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b3"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b3"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bad"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bad"

android:textSize="25sp"/>

</TableRow>

<TableRow

android:layout_height="wrap_content"

android:layout_width="fill_parent">

<Buttonandroid:id="@+id/b4"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b4"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b5"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b5"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b6"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b6"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bsu"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bsu"

android:textSize="25sp"/>

</TableRow>

<TableRow

android:layout_height="wrap_content"

android:layout_width="fill_parent">

<Button android:id="@+id/b7"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b7"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b8"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b8"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b9"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b9"

android:textSize="25sp"/>

<Button android:id="@+id/bmu"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bmu"

android:textSize="25sp"/>

</TableRow>

<TableRow

android:layout_height="wrap_content"

android:layout_width="fill_parent">

<Buttonandroid:id="@+id/bpo"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bpo"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/b0"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/b0"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/beq"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/beq"

android:textSize="25sp"/>

<Buttonandroid:id="@+id/bdi"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="@string/bdi"

android:textSize="25sp"/>

</TableRow>

</TableLayout>

</LinearLayout>

</android.support.constraint.ConstraintLayout>

String.xml

<stringname="app_name">CALCULATION</string>

<stringname="bcl">0</string>

<stringname="b0">0</string>

<stringname="b1">1</string>

<stringname="b2">2</string>

<stringname="b3">3</string>

<stringname="b4">4</string>

<stringname="b5">5</string>

<stringname="b6">6</string>

<stringname="b7">7</string>

<stringname="b8">8</string>

<stringname="b9">9</string>

<stringname="bad">+</string>

<stringname="bsu">-</string>

<stringname="bmu">*</string>

<stringname="bdi">/</string>

<stringname="bsq">√</string>

<stringname="beq">=</string>

<stringname="bpo">.</string>

<stringname="bas">±</string>

<stringname="bce">ce</string>

<stringname="bc">c</string>

</resources>

Shiyan5jishiqi:

Main.java

packagecom.example.administrator.myapplication5;

importandroid.support.v7.app.AppCompatActivity;

importandroid.os.Bundle;

importandroid.os.Handler;

importandroid.os.Message;

importandroid.app.Activity;

importandroid.view.Menu;

importandroid.view.View;

importandroid.view.View.OnClickListener;

importandroid.widget.Button;

importandroid.widget.TextView;

publicclass MainActivity extends AppCompatActivity {

private TextView mint;

private TextView sec;

private Button start;

private Button reset;

private long timeusedinsec;

private boolean isstop = false;

private Handler mHandler = new Handler() {

* edit by yuanjingchao 2014-08-04 19:10

@Override

public void handleMessage(Message msg) {

// TODO Auto-generatedmethod stub

super.handleMessage(msg);

switch (msg.what) {

case 1:

// 添加更新ui的代码

if (!isstop) {

updateView();

mHandler.sendEmptyMessageDelayed(1,1000);

}

break;

case 0:

break;

}

};

@Override

protected void onCreate(BundlesavedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initViews();

}

private void initViews() {

mint = (TextView)findViewById(R.id.mint);

sec = (TextView)findViewById(R.id.sec);

reset = (Button)findViewById(R.id.reset);

start = (Button)findViewById(R.id.start);

reset.setOnClickListener(new OnClickListener() {

@Override

public void onClick(Viewarg0) {

//TODO Auto-generated method stub

mint.setText("00");

sec.setText("00");

start.setText("start");

timeusedinsec=0;

isstop=true;

}

});

start.setOnClickListener(new OnClickListener() {

@Override

public void onClick(Viewarg0) {

//TODO Auto-generated method stub

mHandler.removeMessages(1);

Stringaaa=start.getText().toString();

if(aaa.equals("start")){

mHandler.sendEmptyMessage(1);

isstop = false;

start.setText("停止");

}else {

mHandler.sendEmptyMessage(0);

isstop = true;

start.setText("start");

}

});

}

private void updateView() {

timeusedinsec += 1;

int minute = (int)(timeusedinsec / 60)%60;

int second = (int)(timeusedinsec % 60);

if (minute < 10)

mint.setText("0" + minute);

else

mint.setText("" + minute);

if (second < 10)

sec.setText("0" + second);

else

sec.setText("" + second);

}

Main.xml

<?xmlversion="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayoutxmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.example.administrator.myapplication5.MainActivity">

<RelativeLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true" >

<LinearLayout

android:id="@+id/top"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:orientation="horizontal" >

<TextView

android:id="@+id/mint"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="00"

android:textSize="30dp" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text=":"

android:textSize="30dp" />

<TextView

android:id="@+id/sec"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="00"

android:textSize="30dp"/>

</LinearLayout>

<LinearLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/top"

android:layout_centerHorizontal="true"

android:orientation="horizontal" >

<Button

android:id="@+id/start"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="计时"/>

<Button

android:id="@+id/reset"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="清零" />

</LinearLayout>

</RelativeLayout>

</android.support.constraint.ConstraintLayout>

String:

<stringname="start">计时</string>

<stringname="reset">清零</string>

</resources>

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