Android-LinearLayout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_height="0dp"
        android:layout_width="fill_parent"
        android:background="#ADFF2F"
        android:orientation="horizontal"
        android:layout_weight="3">
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:background="#ADFF2F"
            android:layout_weight="4"
            android:orientation="vertical">
            <Button
                android:id="@+id/output"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAllCaps="false"
                android:text="Output"/>
            <Button
                android:id="@+id/check"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAllCaps="false"
                android:text="Check"/>
            <Button
                android:id="@+id/go"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAllCaps="false"
                android:text="Go!"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:background="#778899"
            android:orientation="vertical"
            android:layout_weight="6">
            <CheckBox
                android:id="@+id/import1"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:text="Import ADB Data"
                android:layout_weight="1"/>

            <CheckBox
                android:id="@+id/import2"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:text="Import Bandicoot Data" />

            <CheckBox
                android:id="@+id/import3"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:text="Import Other Data"
                android:layout_weight="1"/>
        </LinearLayout>
    </LinearLayout>
    <LinearLayout
        android:layout_height="0dp"
        android:layout_width="fill_parent"
        android:background="#DA70D6"
        android:orientation="vertical"
        android:layout_weight="6">
        <TextView
            android:id="@+id/textview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="Loading..........................." />
    </LinearLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="#191970"
        android:layout_weight="1">

        <Button
            android:id="@+id/Clear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/Save"
            android:layout_alignBottom="@+id/Save"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:text="Clear Log"
            android:textAllCaps="false" />
        <Button
            android:id="@+id/Save"
            android:text="Save Log"
            android:textAllCaps="false"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>

</LinearLayout>

package com.example.wanggongsheng.uilayouttest;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button output = (Button)findViewById(R.id.output);
        Button check = (Button)findViewById(R.id.check);
        Button go = (Button)findViewById(R.id.go);
        final TextView textview = (TextView)findViewById(R.id.textview);
        Button clear = (Button)findViewById(R.id.Clear);
        Button save = (Button)findViewById(R.id.Save);
        CheckBox import1=(CheckBox)findViewById(R.id.import1);
        CheckBox import2=(CheckBox)findViewById(R.id.import2);
        CheckBox import3=(CheckBox)findViewById(R.id.import3);
        import1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                String data = textview.getText().toString();
                data = data + "\nImport ADB Data.......";
                textview.setText(data);
            }
        });
        import2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                String data = textview.getText().toString();
                data = data + "\nImport BC Data.......";
                textview.setText(data);
            }
        });
        import3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                String data = textview.getText().toString();
                data = data + "\nImport Other Data.......";
                textview.setText(data);
            }
        });
        output.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                startActivity(intent);
            }
        });
        check.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                startActivity(intent);
            }
        });
        go.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                startActivity(intent);
            }
        });
        clear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                textview.setText("");
            }
        });
        save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"功能没有实现",Toast.LENGTH_SHORT).show();
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.wanggongsheng.uilayouttest.SecondActivity">
    <TextView
        android:layout_width="wrap_content"
        android:text="目前这部分没有完成。"
        android:textSize="24sp"
        android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>