Question

4.1. 切换UI

4.1.1. 

			
setContentView(R.layout.view);			
			
			

4.1.2. startActivity()

		
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
     <application android:label="Test">
 
		...
		...
        <activity android:name=".WriteActivity"></activity>

    </application>

</manifest>		
		
			

		
		Button button = (Button) findViewById(R.id.writeButton);

        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                setContentView(R.layout.activity_write);
                Intent intent = new Intent(MainActivity.this,WriteActivity.class);
                startActivity(intent);
            }
        });		
		
			

4.1.3. Activity 间数据传递

		
Intent it = new Intent(Activity.Main.this, Activity2.class);
Bundle bundle=new Bundle();
bundle.putString("name", "This is from MainActivity!");
it.putExtras(bundle);
startActivity(it);		
		
			

获取数据

		
Bundle bundle=getIntent().getExtras();
String name=bundle.getString("name");