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);
}
}