流式布局+清空历史（添加数据库）

首先，创建一个类

public class FlowLayout extends FrameLayout {
    public FlowLayout(Context context) {
        super(context);
    }

    public FlowLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FlowLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        //先获取控件的宽度
        int width = getWidth();
        //定义一个常量行数
        int row = 0;
        //子控件左边的坐标
        int disWidth = 18;
        for (int i = 0; i < getChildCount(); i++) {
            View view = getChildAt(i);
            int viewWidth = view.getWidth();
            int viewHeight = view.getHeight();
            if (disWidth + viewWidth > width) {
                row++;
                disWidth = 18;
            }
            view.layout(disWidth, row * viewHeight, viewWidth + disWidth, viewHeight * (row + 1));
            disWidth += viewWidth;//disWidth = disWidth+viewWidth;
        }
    }
}

创建一个布局

<LinearLayout xmlns: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:id="@+id/line1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/line2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/edit01"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/text"
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="搜索"
            android:textColor="#003cff"
            android:textSize="18sp" />

    </LinearLayout>

    <comm.example.lenovo.weektext_03.FlowLayout
        android:id="@+id/main_flow"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="8">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10sp"
            android:text="Apple"
            android:textColor="#c800ff"
            android:textSize="22sp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10sp"
            android:text="小米"
            android:textColor="#2bff00"
            android:textSize="22sp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10sp"
            android:text="OPPO"
            android:textColor="#ffea00"
            android:textSize="22sp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10sp"
            android:text="ViVO"
            android:textColor="#ffff00"
            android:textSize="22sp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10sp"
            android:text="笔记本"
            android:textColor="#ff7700"
            android:textSize="22sp" />

    </comm.example.lenovo.weektext_03.FlowLayout>

    <Button
        android:id="@+id/btn_clear"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="清除数据" />
</LinearLayout>

最后实现MainActivity

import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

import comm.example.lenovo.weektext_03.database.MyHelper;

public class MainActivity extends AppCompatActivity {

    private EditText mEdit01;
    /**
     * 搜索
     */
    private TextView mText;
    private LinearLayout mLine2;
    private FlowLayout mMainFlow;
    /**
     * 清除数据
     */
    private List<String> list = new ArrayList<>();
    private Button mBtnClear;
    private LinearLayout mLine1;
    private SQLiteDatabase writableDatabase;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();



        mText.setOnClickListener(new View.OnClickListener() {



            @Override
            public void onClick(View view) {
                FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
                String s = mEdit01.getText().toString();
                MyHelper myHelper = new MyHelper(MainActivity.this);
                writableDatabase = myHelper.getWritableDatabase();
                writableDatabase.execSQL("insert into cx(title) values(?)",new String[]{s});
                list.add(s);
                TextView textView = new TextView(MainActivity.this);
                textView.setText(list.get(list.size() - 1));
                textView.setTextColor(Color.BLUE);
                textView.setTextSize(30);
                mMainFlow.addView(textView, params);
            }
        });
        mBtnClear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mMainFlow.removeAllViews();
                writableDatabase.delete("cx",null,null);
            }
        });
    }

    private void initView() {
        mEdit01 = findViewById(R.id.edit01);
        mText = findViewById(R.id.text);
        mLine2 = findViewById(R.id.line2);
        mMainFlow = findViewById(R.id.main_flow);
        mBtnClear = findViewById(R.id.btn_clear);
        mBtnClear = findViewById(R.id.btn_clear);
        mLine1 = findViewById(R.id.line1);
    }
}