CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

This error comes when I try to install ADT: An error occurred while collecting items to be installed session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=). No repository found containing: osgi.bundle,com.android.ide.eclipse.adt,16.0.1.v201112150204-238534 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.adt,16.0.1.v201112150204-238534 No repository found containing: osgi.bundle,com.android.ide.eclipse.ddms,16.0.1.v201112150204-238534 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.ddms,16.0.1.v201112150204-238534 No repository found containing: osgi.bundle,com.android.ide.eclipse.hierarchyviewer,16.0.1.v201112150204-238534 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.hierarchyviewer,16.0.1.v201112150204-238534 No repository found containing: osgi.bundle,com.android.ide.eclipse.traceview,16.0.1.v201112150204-