Android 上的 Intent 与 Bundle 的传值区别

1.Intent的putExtra()方法有

public Intent putExtra(String name, boolean value);

public Intent putExtra(String name, byte value);

public Intent putExtra(String name, char value);

public Intent putExtra(String name, short value);

public Intent putExtra(String name, int value);

public Intent putExtra(String name, long value);

public Intent putExtra(String name, float value);

public Intent putExtra(String name, double value);

public Intent putExtra(String name, String value);

public Intent putExtra(String name, CharSequence value);

public Intent putExtra(String name, Parcelable value);

public Intent putExtra(String name, Parcelable[] value);

2.Activity传值与接收数据

2.1 传值

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

editText = (EditText) findViewById(R.id.edit);

button = (Button) findViewById(R.id.button1);

String txt = editText.getText().toString();

button.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String string = editText.getText().toString();

Intent intent = new Intent(MainActivity.this, main.class);

intent.putExtra("name", string);

startActivity(intent);

     }

         });

}

2.2 接收数据

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

textView = (TextView) findViewById(R.id.txt2);

Intent intent = getIntent();

String string = intent.getStringExtra("name");

textView.setText(string);

}

3.Activity用Bundle传值

protectedvoidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

editText = (EditText) findViewById(R.id.edit);

button = (Button) findViewById(R.id.button1);

String txt = editText.getText().toString();

button.setOnClickListener(newOnClickListener() {

@Override

publicvoidonClick(View v) {

String string = editText.getText().toString();

Intent intent =newIntent(MainActivity.this, main.class);

Bundle bundle =newBundle();

bundle.putString("name", string);

intent.putExtras(bundle);

startActivity(intent);

}

});

}

3.1接收Bundle 的Activity

protectedvoidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

textView = (TextView) findViewById(R.id.txt2);

Intent intent = getIntent();

Bundle bundle = intent.getExtras();

String string = bundle.getString("name");

textView.setText(string);

}