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Java - First Android App By No.5972

Hot 1Viewed 1792 times2017-3-17 12:21

MainActivity.java:
//passed at Android Developer Tools Build: v22.6.2-1085508
package com.example.hwtest;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

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

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }
    int i=0;
    public void Exit(View view) {
        //System.exit(0);
        TextView text1 = (TextView)findViewById(R.id.textView1);
        text1.setText("Clicked x "+(++i));
    }
    
    public void Close(View view) {
        AlertDialog.Builder builder  = new Builder(MainActivity.this);
        builder.setTitle("No.5972's First App!");
        builder.setMessage("No way to close! HAHAHA! ");
        builder.setPositiveButton("OK" ,null);
        builder.show();
        //System.exit(-1);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            TextView text1 = (TextView)findViewById(R.id.textView1);
            text1.setText("Clicked another x "+(++i));
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);
            return rootView;
        }
    }

}


string.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">No.5972's First App!</string>
    <string name="hello_world">Hello world!</string>
    <string name="button1_name">Click!</string>
    <string name="action_settings">Settings</string>
    <string name="button2_name">Close</string>
    <string name="text2_name">This is the first app made by No.5972 myself! HAHAHA! </string>

</resources>

fragment_main.xml
<RelativeLayout xmlns: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.hwtest.MainActivity$PlaceholderFragment" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="21dp"
        android:onClick="Exit"
        android:text="@string/button1_name" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="25dp"
        android:text="@string/text2_name" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView2"
        android:layout_marginLeft="14dp"
        android:layout_toRightOf="@+id/textView1"
        android:onClick="Close"
        android:text="@string/button2_name" />

</RelativeLayout>

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