Intent 传递数据

Intent 传递数据

Intent 传递简单数据

基本数据

SYNTAX

putExtra(String name, String value)

getStringExtra(String name)

putExtra(String name, int value)

getIntExtra(String name, int defaultValue)

EXAMPLES

数组

SYNTAX

putExtra(String name, String[] value)

getStringArrayExtra(String name)

putExtra(String name, int[] value)

getIntArrayExtra(String name)

EXAMPLES

Intent intent = new Intent(IntentTestActivity.this,IntentDataActivity.class);
intent.putExtra("StringArray",new String[]{"刘备","关羽","张飞"});
// value 可以为其他类型，如 int,float...数组
startActivity(intent);

Intent intent = getIntent();
String[] strArray = intent.getStringArrayExtra("StringArray");

集合

SYNTAX

putStringArrayListExtra(String name, ArrayList<String> value)

getStringArrayListExtra(String name)

putIntegerArrayListExtra(String name, ArrayList<Integer> value)

getIntegerArrayListExtra(String name)

EXAMPLES

Intent intent = new Intent(IntentTestActivity.this,IntentDataActivity.class);
ArrayList<String> strList = new ArrayList<>();
strList.add(0,"刘备");
strList.add(1,"关羽");
strList.add(2,"张飞");
intent.putStringArrayListExtra("StringList",strList);
startActivity(intent);

Intent intent = getIntent();
ArrayList<String> strList = intent.getStringArrayListExtra("StringList");

Intent 传递对象

SYNTAX

putExtra(String name, Serializable value)

getSerializableExtra(String name)

putExtra(String name, Parcelable value)

getParcelableExtra(String name)

putExtra(String name, Parcelable[] value)

getParcelableArrayExtra(String name)

putParcelableArrayListExtra(String name, ArrayList<? extends Parcelable> value)

getParcelableArrayListExtra(String name)

EXAMPLES

Intent intent = new Intent(IntentTestActivity.this,IntentDataActivity.class);
Student student = new Student("吕布",30);
intent.putExtra("Student",student);
startActivity(intent);

Intent intent = getIntent();
Student student = intent.getParcelableExtra("Student");

Intent 传递Bitmap

直接传递

Intent intent = new Intent(SendActivity.this, ReceiveActivity.class);
Bitmap bitmap = xxx; //xxx根据实际情况获取
intent.putExtra("BITMAP",bitmap);
startActivity(intent);

Intent intent = getIntent();
if(intent!=null){
Bitmap bm = intent.getParcelableExtra("BITMAP");
}

通过Bundle传递

Intent intent = new Intent(SendActivity.this, ReceiveActivity.class);
Bundle bundle = new Bundle();
Bitmap bitmap = xxx; //xxx根据实际情况获取
bundle.putParcelable("BITMAP", bitmap);
intent.putExtra("bundle", bundle);
startActivity(intent);

Intent intent = getIntent();
if(intent!=null){
Bundle bundle = intent.getBundleExtra("bundle");
Bitmap bm = bundle.getParcelable("BITMAP");
}

通过byte[]传递

private byte[] convertBitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG,100,baos);
return baos.toByteArray();
}

private Bitmap convertBytes2Bitmap(byte[] buff){
Bitmap bm = BitmapFactory.decodeByteArray(buff,0,buff.length);
return bm;
}

Intent intent = new Intent(SendActivity.this, ReceiveActivity.class);
byte[] buff = convertBitmap2Bytes(cover);
intent.putExtra("buff",buff);
startActivity(intent);

Intent intent = getIntent();
if(intent!=null){
byte[] buff = intent.getByteArrayExtra("buff");
Bitmap bm = convertBytes2Bitmap(buff);
}