实现界面的跳转

运行效果图



MainActivity.java:-

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
<span style="color:#ff0000;">public static final String TAG = "MainActivity";</span>
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d(TAG, "onCreate");
Button startNormalActivity = (Button) findViewById(R.id.btnStartNormalActivity);
Button startDialogActivity = (Button) findViewById(R.id.btnStartDialogActivity);
startNormalActivity.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, NormalActivity.class);
startActivity(intent);
}
});
startDialogActivity.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, DialogActivity.class);
startActivity(intent);
}
});
}

@Override
protected void onStart() {
super.onStart();
Log.d(TAG, "onStart");
}

@Override
protected void onResume() {
super.onResume();
Log.d(TAG, "onResume");
}

@Override
protected void onPause() {
super.onPause();
Log.d(TAG, "onPause");
}

@Override
protected void onStop() {
super.onStop();
Log.d(TAG, "onStop");
}

@Override
protected void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy");
}

@Override
protected void onRestart() {
super.onRestart();
Log.d(TAG, "onRestart");
}

}

activity_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=".MainActivity" >

<Button
android:id="@+id/btnStartNormalActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="116dp"
android:text="Start NormalActivity" />

<Button
android:id="@+id/btnStartDialogActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/btnStartNormalActivity"
android:layout_centerVertical="true"
android:text="Start DialogActivity" />

</RelativeLayout>

点击Start NormalActivity显示界面



NormalActivity.java:

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class NormalActivity extends Activity {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.normal, menu);
return true;
}

}
activity_normal.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=".NormalActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a normal activity" />

</RelativeLayout>

点击Start DialogActivity.java显示界面



DialogActovity.java

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class DialogActivity extends Activity {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.dialog, menu);
return true;
}

}


activity_dialog.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=".DialogActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a dialog activity" />

</RelativeLayout>