一，纯代码
布局的引用。纯代码，听着很刺激哦，android还有这个操作，牛逼吧，Google 66666
纯代码实现登录界面，用一变二，看代码，复杂的界面都是由简单的演变而来，加油吧，骚年
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.text.InputFilter;
import android.text.TextUtils;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
import song.com.cn.R;
/**
* @author lixiang
* @date :2017/11/3
* @Description: 纯代码
*/
public class PureCodeActivity extends Activity {
private EditText editInfo;
private EditText passWord;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initUI();
}
@SuppressLint("ResourceType")
public final void initUI() {
ScrollView main = new ScrollView(this);
main.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
main.setBackgroundColor(Color.WHITE);
//根布局参数
LinearLayout.LayoutParams layoutParamsRoot = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
layoutParamsRoot.gravity = Gravity.CENTER;
//根布局
LinearLayout layoutRoot = new LinearLayout(this);
layoutRoot.setLayoutParams(layoutParamsRoot);
layoutRoot.setOrientation(LinearLayout.VERTICAL);
//上边距（dp值）
int topMargin = dip2px(this, 30);
//imageMain宽度（dp值）
int widthMain = dip2px(this, 240);
//imageMain高度（dp值）
int heightMain = dip2px(this, 120);
//imageMain布局参数
LinearLayout.LayoutParams layoutParamsImageMain = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, heightMain);
layoutParamsImageMain.topMargin = topMargin;
layoutParamsImageMain.bottomMargin = topMargin;
layoutParamsImageMain.leftMargin = topMargin;
layoutParamsImageMain.rightMargin = topMargin;
layoutParamsImageMain.gravity = Gravity.CENTER_HORIZONTAL;
//初始化ImageView
ImageView imageMain = new ImageView(this);
imageMain.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageMain.setAdjustViewBounds(true);
imageMain.setImageResource(R.mipmap.laoying);
layoutRoot.addView(imageMain, layoutParamsImageMain);
//按钮布局
LinearLayout layoutUser = new LinearLayout(this);
layoutUser.setLayoutParams(layoutParamsImageMain);
layoutUser.setOrientation(LinearLayout.HORIZONTAL);
//editInfo布局参数
LinearLayout.LayoutParams layoutParamsEditInfo = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsEditInfo.gravity = Gravity.LEFT;
layoutParamsEditInfo.leftMargin = dip2px(this, 10);
layoutParamsEditInfo.rightMargin = dip2px(this, 5);
layoutParamsEditInfo.weight = 1;
//初始化textInfo
TextView textInfo = new TextView(this);
textInfo.setLayoutParams(layoutParamsEditInfo);
textInfo.setGravity(Gravity.LEFT);
textInfo.setTextSize(18);
textInfo.setText("账号:");
layoutUser.addView(textInfo);
//
LinearLayout.LayoutParams layoutParamsET = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsET.gravity = Gravity.RIGHT;
layoutParamsET.leftMargin = dip2px(this, 10);
layoutParamsET.rightMargin = dip2px(this, 5);
layoutParamsET.weight = 1;
//初始化editInfo
editInfo = new EditText(this);
editInfo.setLayoutParams(layoutParamsET);
editInfo.setGravity(Gravity.LEFT);
editInfo.setHint("请输入账号");
editInfo.setLines(1);
editInfo.setEllipsize(TextUtils.TruncateAt.END);
//设置可输入的最大长度
InputFilter[] filters = {new InputFilter.LengthFilter(20)};
editInfo.setFilters(filters);
editInfo.setTextSize(18);
layoutUser.addView(editInfo);
layoutRoot.addView(layoutUser, layoutParamsEditInfo);
//密码输入
passWord(layoutRoot, layoutParamsImageMain);
//上边距（dp值）
int minHeight = dip2px(this, 54);
//上padding（dp值）
int topPadding = dip2px(this, 4);
//左padding（dp值）
int leftPadding = dip2px(this, 2);
//按钮布局
LinearLayout layoutButton = new LinearLayout(this);
layoutButton.setLayoutParams(layoutParamsEditInfo);
layoutButton.setOrientation(LinearLayout.HORIZONTAL);
layoutButton.setMinimumHeight(minHeight);
layoutButton.setPadding(leftPadding, topPadding, leftPadding, topPadding);
layoutButton.setId(100000001);
//buttonOK布局参数
LinearLayout.LayoutParams layoutParamsButtonOK = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsButtonOK.gravity = Gravity.LEFT;
layoutParamsButtonOK.leftMargin = dip2px(this, 10);
layoutParamsButtonOK.rightMargin = dip2px(this, 5);
layoutParamsButtonOK.weight = 1;
//Button确定
Button buttonOK = new Button(this);
buttonOK.setLayoutParams(layoutParamsButtonOK);
buttonOK.setMaxLines(2);
buttonOK.setTextSize(18);
buttonOK.setText("登录");
layoutButton.addView(buttonOK);
//buttonCancel布局参数
LinearLayout.LayoutParams layoutParamsButtonCancel = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsButtonCancel.gravity = Gravity.RIGHT;
layoutParamsButtonCancel.leftMargin = dip2px(this, 5);
layoutParamsButtonCancel.rightMargin = dip2px(this, 10);
layoutParamsButtonCancel.weight = 1;
//Button取消
Button buttonCancel = new Button(this);
buttonCancel.setLayoutParams(layoutParamsButtonCancel);
buttonCancel.setMaxLines(2);
buttonCancel.setTextSize(18);
buttonCancel.setText("取消");
layoutButton.addView(buttonCancel);
layoutRoot.addView(layoutButton, layoutParamsEditInfo);
buttonOK.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(PureCodeActivity.this, "账号:" + editInfo.getText().toString() + " 密码：" + passWord.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
buttonCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
//RelativeLayout布局参数
LinearLayout.LayoutParams layoutParamsBottom = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout layoutBottom = new RelativeLayout(this);
layoutBottom.setLayoutParams(layoutParamsBottom);
main.addView(layoutRoot);
setContentView(main);
}
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
private void passWord(LinearLayout layoutRoot, LinearLayout.LayoutParams layoutParamsImageMain) {
//按钮布局
LinearLayout layoutUser = new LinearLayout(this);
layoutUser.setLayoutParams(layoutParamsImageMain);
layoutUser.setOrientation(LinearLayout.HORIZONTAL);
//editInfo布局参数
LinearLayout.LayoutParams layoutParamsEditInfo = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsEditInfo.gravity = Gravity.LEFT;
layoutParamsEditInfo.leftMargin = dip2px(this, 10);
layoutParamsEditInfo.rightMargin = dip2px(this, 5);
layoutParamsEditInfo.weight = 1;
//初始化textInfo
TextView textInfo = new TextView(this);
textInfo.setLayoutParams(layoutParamsEditInfo);
textInfo.setGravity(Gravity.LEFT);
textInfo.setTextSize(18);
textInfo.setText("密码:");
layoutUser.addView(textInfo);
//buttonOK布局参数
LinearLayout.LayoutParams layoutParamsET = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParamsET.gravity = Gravity.RIGHT;
layoutParamsET.leftMargin = dip2px(this, 10);
layoutParamsET.rightMargin = dip2px(this, 5);
layoutParamsET.weight = 1;
//初始化editInfo
passWord = new EditText(this);
passWord.setLayoutParams(layoutParamsEditInfo);
passWord.setGravity(Gravity.LEFT);
passWord.setLines(1);
passWord.setEllipsize(TextUtils.TruncateAt.END);
passWord.setHint("请输入密码");
//设置可输入的最大长度
InputFilter[] filters = {new InputFilter.LengthFilter(20)};
passWord.setFilters(filters);
passWord.setTextSize(18);
layoutUser.addView(passWord);
layoutRoot.addView(layoutUser, layoutParamsEditInfo);
}
}